The given diagram indicating the curve of W. Penck's cycle of erosion shows which of the following…
In Walter Penck's geomorphic diagram, the upper curve shows summit heights and the lower curve shows valley-floor heights. Because the two curves already diverge in stage A,…
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The given diagram indicating the curve of W. Penck's cycle of erosion shows which of the following features ?
1. Only upliftment in stage A
2. Rate of upliftment in stage A is lower than that of B
3. Upliftment is more than erosion in stage B
4. Rate of erosion in stage E is higher than that of D
Answer and explanation
Correct answer B
In Walter Penck's geomorphic diagram, the upper curve shows summit heights and the lower curve shows valley-floor heights. Because the two curves already diverge in stage A, valley incision accompanies uplift from the outset (making statement 1 false), and the steeper initial rise in stage A compared to stage B makes statement 2 false. In stage B, both curves rise because uplift exceeds erosion (statement 3 is true), and in the waning stages D and E, erosional lowering is stronger in stage E than in stage D (statement 4 is true), making "3 and 4" correct.
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